Report: Miley Cyrus Breaks Up With Older Boyfriend; Jonas May Be Involved

It just wasn't meant to be.

Star-crossed BFFs Miley Cyrus and Justin Gaston have apparently called it a day less than a year after they started dating. says the two split for good on Sunday.

"They have been having trouble for a while," an insider told US. "It's been hard for a long time since Miley has been working so much and traveling a lot."

PHOTOS: Click for pics of now-single Miley Cyrus.

But here's the juicy part: a Jonas may be involved.

While the Web site's source says Nick Jonas "was not the reason for the split," the source adds that "Miley and Nick are working on a couple different projects together [and] Justin has been a little jealous of that."

MORE: Click for the full report on

Cyrus, 16, also told US this past weekend that she and Gaston, 20, would be parting ways for the time being anwyay as she went to work on a new film.

"He's got his own thing going on," Cyrus told the magazine. "But I am just continuing to work hard."

PHOTOS: Click for more pics of Miley and Justin.

Throwing yourself into your work. The perfect cure for a broken heart.

Stay strong, Miley! :(